Corner-joint for screens and other frames.



F. W- & B. S. VAN FLEET. CORNER JOINT FOR SCREENS AND OTHER FRAMES.

APPLICATION FILED. JAN. 30. 1911. v

Patented Nov. 6, 1917.

WITNESSES A-r-ronnmr WWW? UNITED s'raras rarnnr carton.

FREDERICK W. VAN FLEET AND RODNEY S. VAN FLEET, 0F TOLEDO, OHIO. I

CORNER-JOINT FOR SCREENS AND OTHER FRAMES.

I Specification of Letters Patent.

Patented Nov. 6, 1917.

Application filed January 30, 1917. Serial No. 145,549.

To all whom it may concern: 7

Be it'known that we, FREDERICK \V. VAN FLEET and RODNEY S. VAN FLEET,citizens of the United States, residing at Toledo, in

the county of Lucas and State of Ohio, have invented a new and usefulCorner-Joint for Screens and other Frames, of which the following is aspecification.

This invention has reference to corner joints for screens and otherframes, and its object is to provide a blind joint connection Forconvenience of description, the in-' vcutiou will be referred to as ascreen frame without, however, being limited in its utility to suchparticular kind of frame.

In accordance with the invention the rails or bars may be of likeconstruction. Each rail is provided at one end with a looped strap ofmetal constituting in effect amortise designed to receive the oppositeend of a companion rail, which latter is so constructed as to both enterand embrace the mortise strap. The rail is rabbcted along one edge toreceive the screen and holding bead, and along the plane of the rabbetthe rail is slit longitudinally, thereby providing a tongue on one faceof the rail as much narrower than the rail as is determined by the widthof the rabbet. The other side of the tenon end of the rail iscorrespondingly slit, while the rail is cut through perpen dicular tothe depth of the rabbct where it joins the body of the rail to such anextent that the slit portion reaches theslit forming the tongue on theopposite face ofthe tenon end of the rail.

The mortise end ofthe rail is correspond jingly slit lengthwise for asufiicient distance to receive the leg end of the mortise loop,

which latter is of substantially rectangular cross-section and of a sizeto readily receive the tenon end of a companion rail. v The mortise endof the rail is formed with a shoulder movable along the rabbet portionof the tenon end of the rail, while the more tise end is of a size torece ve the entire tenon, including that port on separated from the bodyof the tenon by the slit'perpendicular to the plane ofthe face of therabbet. The last-named slit permits the application of a wedge in thetenon to expand it tightly in the mortise, While the longitudinal slitsform ng the tenon are of sufficient length to permit the assemblage ofthe rails in a manner to adapt the frame to openings of different sizes.

The invention will be best understood from a consideration of thefollowing detailed description, taken in connection with theaccompanying drawings formingpart of this specification, with thefurther understanding that while the drawings "show a practical form ofthe invention, the latter 1s not confined to any strict conformity'withthe showing of the drawings, but may be changed and modified so long assuch changes and modifications come Within the scope of the appendedclaims.

' In the drawings:

Figure l is a perspective view of the tenon end of a rail.

Fig. 2 is a perspective view of the mortise end of a rail.

Fig. 8 is a plan view of assembled mortise and tenon ends ofrespectiverails prior ,to the trimming of the assembled corner.

I Fig. 4 1s a view similar to Fig. 3, but

showing a completed or finished corner Fig. 5 is a section on the line5-5 of Fig. 3.

Fig. 6 is a section on the line 6-6 of Fig. 3.

Fig. 7 is a perspective View of a metallic mortise loop.

The screen frame of thepresent invention is made up of four rails 1,usually of gen-,

erally rectangular cross-section, but not necessarily of any particularcross-sectional shape. The rails are'customarily of such length'as maybe neededr to produce a frame to fit, a certain sized opening andprovide for the fitting of theframe to other sizes of openingswithin.suchlimits as may be found, expedient in manufacture. Along oneedge ofthe rallthere is formed a rabbet 2, such as is customarily provided toreceive Wire netting?) and a retaining head 4. Each rail is provided.with a tenon end .5 and a mortise end 6, so that one type of rail issuff cient, forall four sides of the frame, such framesbeingcustomarily'of rec- With the Wire screen receiving faceof the rabbet2,-thesl1t 7 extending-from one face to the other of the rail andlengthwise of the rail for such distance as may be desired, the distancebeing usually suflicient t-per init=the use of the rail for openings ofvarious Widths.

Entering the tenoir'end of the'rail'near the opposite face thereof,andspaced from such'opposite face by a distance about equal tot'he depthof the rabbet 2, is another longitudinal slit 8 extending completely Ithrough the rail from one edge'to the other, and of a length'about equaltothat of theslit 7. The

tongues 10 and '11, respectively, on opposite *rzibbet 2. i thet'enon 9is another slit 12 perpendicular to the face of the ra'bbet 2 anddividing the t'enon' 9,"so that it comprises a main portion anda portion9 of less Width. "TheslitlQ is about as long as either of the slits 7 or8, and isdesignedto serve a purposeuvhich rower than the tongue 11 bythe Width of the Extending transversely through will hereinafter appear.

stantially rectangular yoke end 18 'Witli'the Eacli'rail has along theedge remote from thatprovided with the rabbet 2, acentral "longitudinalgroove orch'annel 13 .of awiclth about equal to that of the tenon 9 andthe slits 7 and 8 combined.

sponding in position to, and of 'less'longitudinal extent thanthe' slits7 and 8. While I the slits 7 and SeXteDdentirelythroughthe railftheslits1-1.- and 15 maystop short of "that edge of therail containing the"groove 13. Seatedinthe slits lat and'15 are the leg ends 16'of a'mortiseloop 17 whichmay be conveniently formed of sheet metal bentinte'rmediately upon itself to'p'rovideatsublegs 16substantiallyparallel one'lto the other. The mortise loop 17 is shown as'having one Ledge of each leg 16 beveled or nar- 4 rowed, as"indica'tedat 19, so' that"it may morereadilyfit'into the slits l4; 'and' 15 "whichmaybe in the formofsaw kerfs. The

-"l'egs16-have' matching perfOratiOnsQO and 'for the passageotscrewsorhails, and

1 larger size'than the first-named perforations. Y

other matching perforationsQZ of somewhat That side ofthemortiseend 6of. the'rail in Which the rabbet 2' is formed has a 1 short tongue 23projecting lengthwise of therail,

f therahbetbeing only suflicientto'acc'ommodate the'netting 3 and head4.

r The loop 17 is appliedtothe-ehd: 6 bf the 'i'tll"W-itlPthG- lBgSlG'seated intheslits-li and l 15. I it pin 24L 1 driven through theamortise end 6' of the rail and traversing the matching passages 21serve to hold the mortise loop firmly to the mortise end of the rail,""While; screw or other suitable fastening means entering the railthrough the perforationn20- serves to further anchorthe mortise loop tothe rail and fixedly position it thereon.

When the parts are to be assembled, the the tenon 9 withits'extensmn-9is introduced into the mortise loop ivhich projects fr'orn. themortise end 6 bf th'erail for asufficient distance, and this mortiseloopmay be moved along the/slits 7 and 8' to any-desired j distance"within" "the lengths of these" slits. In 3 thisivay a frame '*n1ade'=upof four rails may be asselnbledto a desired size, and then (otherpassages20,*which 'are so' positioned as to 'be opposite the rabbetportion of the "companion *"rail receive i fastening devices such a s"screws 2601* the like; securing the Sloop '17 tothe'tenon end of thecompanion trail. T-hejoint' is finished by drivingoneor I more bradsornails 27 through the tongues "10 and" llyiviththesenails traversing thepassagesQQ which aremadelarge enough to avoid liability 'of 'strikingthe metal= of the loop'"17. Before 3 the loop '17 has-been' made "fast'to thevcom-pa n-ion mu, wedge- 28 is driven into the slit 12, thusspreading the .tenon' members 9 and-T) apart anditightly clamping themagainst the yoke end 18 of "the mortisel'oop l7 'a'nd the' end of the-rail "from which" the'inorti'se'loop' rojects. After the partshave'heen" firmly secured "together as in them'anner described, any:projecting portion ofthe" tcnon end 'of the rail leeyond the-loop" end'of the companion rail may be cut or, andthe ira me is then of a size tofit th e-ope'ning-yor" may need some little dressing with a plancgthisbeing prov-ided-forhy 'thegroore's'13which position the metalpartsasho'rt distance below the surface of the *ivood at'the edges oftheframe.

The structure is particularly rigid, since "the-"mortise loop may 'bepressed out from sheet steel'and is'farstronger than'the WOOCl ofwhichthe=frameiscustomarily made; and being seated in and secured. totherail -p'rovides in-conjunc'tion' with the' t'enorr end of "the railaparticularly rigid--and-"strong corner joint. If the tenon-end of therail be of considerable length it "may be advisable to' fastenth'e'tongues 10'and 11- *by more nails than the'o'ne or two nails driventhrough the iopenings' 22. r

"The "corner 'j oint has the reinforcing member in the' form ofthe=mortise loop embedded and entirely outof sightivh'en the screenframeisli-located in an opening.

= 1. A'jointcomprising"two abuttingbars "-inangular relation, onebarhaving a mortise loop fast thereto and the other bar being provided witha tenon for entering the mortise loop and having tongues flanking thetenon and embracing the mortise loop in the assembled joint.

2. A joint comprising two angularly abutting bars, one having a mortiseloop of less thickness than the bar carrying it and fast to andprojecting from one end of the bar, and the other bar having a dividedtenon movable into the mortise loop and provided with tongues onopposite sides of the tenon for embracing the mortise loop, the dividedtenon having its parts spaced to receive a wedge for spreading the tenonwithin the mortise loop.

3. A joint comprising two angularly abutting bars, one having a metallicloop extending therefrom and constituting a mortise loop and the otherbeing formed with a tenon of a size to enter the mortise loop andprovided with tongues on opposite sides of the tenon and in theassembled joint exterior to the mortise loop, said loop having passagesfor fastening devices securing the loop to the bar carrying it and tothe bar received by the loop.

at. A joint comprising two angularly related bars fitted together, onebar being provided with a metallic loop projecting therefrom and of lessthickness than the bar and the other bar having longitudinal slitsdefining an intermediate tenon and flanking tongues to receive themortise loop with the tenon extending therethrough and the tonguesexterior to the mortise loop in flanking relation thereto.

5. A frame bar having at one end a mortise loop of less thickness thanthe bar and located intermediate of the thickness of the bar andextending longitudinally therefrom to provide a mortise between the yokeend of the loop and the bar, and the other end of the bar havinglongitudinal slits extending in the direction of the width and thicknessof the bar and defining an intermediately divided tenon and flankingtongues, with the tenon of a size to extend through the mortise and thetongues spaced from the tenon to receive the mortise loop between themand the tenon.

6. A frame bar provided at one end with a longitudinally projectingsheet metal loop 7 having the yoke end outermost and the legs of theloop seated lengthwise into the end of the bar and the other end of thebar being formed with lengthwise longitudinal slits extending throughthe bar to form an intermediate tenon and flanking tongues, and thetenon having a lengthwise slit dividing it into two parts.

7 A frame bar provided at one end with a longitudinally projecting sheetmetal loop having the yoke end outermost and the legs of the loop seatedlengthwise into the end'of the bar, and the other end of the bar beingformed with lengthwise longitudinal slits extending through the bar toform an intermediate tenon and flanking tongues, and the tenon having alengthwise slit dividing it into two parts, the mortise loop havingpassages therethrough for fastening devices securing it to the end ofthe bar from which it projects and for other fastening devices forsecuring the mortise loop to the tenon end of a companion bar.

8. A frame including interlocking bars each provided at one end with amortise loop projecting therefrom and located intermediate of the widthof the bar in spaced relation to the sides of the bar, and each bar alsohaving a tenon end with longitudinally extended slits defining anintermediate tenon and flanking tongues with the tenon of a size toenter the mortise loop with the tongues exterior thereto, and said tenonhaving a longitudinal slit transversely of the width of the bar toreceiv a wedge for spreading the tenon when located within the mortiseloop.

In testimony, that we claim the foregoing as our own, we have heretoaflixed our signatures in the presence of two witnesses.

FREDERICK W. VAL FLEET. RODNEY S. VAN FLEET. Witnesses:

OLIVIA VERRELL, LOUIS J ACOBSON.

Copies of this patent ma; be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. G.

